Antihunting regulator system



April 29, 1924. 1,492,197

C. A. BODDIE ANTIHUNTING REGULATOR SYSTEM Filed Aug. 26, 1919 2Sheets-Sheet 1 Hy a WITNESSES Z INVENTOR I 0.7% C/ar ezxe 4. BOJJ/el/KZ). W14

BY v 7 AfioRNEY c. A. BODDIE ANTIHUNTING REGULATOR SYSTEM Filed z- 26.1919 2 Sheets-Sheet 2 WITNESSES: INVENTOR WWW Clarence A. Bodd/eATTORNEY Patented Apr.

UNIT

. HOUSE ELECTRIC & MANUF VAN IA.

To all whom it Be it known a citizen of the dent of Pittsburgh, ghenyand State of Pennsylvania,

and useful Improvement in vented a new ED STATESPAT ENT OFFICE.

CLARENCE A. BODDIE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- vACTURING COMPANY, A CORPORATION 01 PENNSYL- ANTIHUNTING REGULATORSYSTEM.

Application filed August 26, 1919. Serial No. 819,904.

may conoem: that I, CLARENCE A. Bonnm,

United States, and a resiin the county of Allehave in- AntihuntingRegulator Systems, of which the following is a specification.

My inventlon relates to voltage regmlator systems and particularly tovoltage-regulator s stems for governing the excitation of supp y-circuitgenerators to maintain substantially constant voltage on supplycircuits.

One object of my invention is to rovide a voltage-regulator system thatshal maintain the voltage on a supply circuit substantially constant ina simple and an efficient manner and that hunting means to be op shallbe provided with antierated in accordance with variations in excitationof the generator connected to In practicing m trol element, whic thesupply circuit.

nventlon, a main con- 1s operated in accordance with the voltageobtaining on the suppl circuit, is

ating two switches for governin provided for selectively opertherotation of a; motor in a clockwise an in a counter-clockwise direction.The motor serves to operate a rheostat for governing the excitation of agenerator which is connected to the supply circuit.

An auxiliary magnet is energized in accordance with the excitation ofthe generator and the operation of the 'rheostat and co-operates withthe main magnet to so govern the operation of the switches as to preventaction.

In the accompanying is a diagrammatic view tem constructed tion.

any so-called hunting drawing, Figure 1 accordance with my in- 2 and 3are diagramof my inven- Referring to the drawing, a'main genera tor 1,comprising an winding 3, 1s connected to a supply circuit com risingconductors armature 2 and a field 4, 5 and 6. The field win ing 3 isconnected in series with an adjustable resistor 7 and a rheostat 8across a battery 9 and an exciter generator 10. The exciter generator 10comprises an armature 11 and a shunt field winding 12 which by means ofthe switches 15 and 16. A of a regulator sys-' is connected in serieswith an adjustable resistor 13.

A main ma et 14 is provided for selectively operati two switches 15 and16 to govern a motor sister 8. The main magnet 14 comprises a winding18, which is connected across the 17 for operating the resupply-circuitconductors 5 and 6 by means a 27 carrying contact members 28 and 29which respectively engage contact members 30 and 31, according to theoperative position of the switch arm. The switch 16, comprises a winding32 which is connected across the battery 9 and the exciter generator 10,upon engagement between the contact members 23 and 24, and operates aswitch arm 33. The switch arm 33 carries two contact members 34 and 35which respectively engage contact members 36 and 3 in accordance withthe operative position of the switch arm.

, The motor17 comprises 38, which is directly connected across thebattery 9 and the exciter generator 10, and an armature 39 which isconnected across the battery 9 and the exciter generator 10 shaft 40 ofthe armature 39 is connected to the rotatable arm 41 of the rheostat 8in any suitable manner, as by means of the worm gearing 42. Therheostatarm- 41 varies the resistance value of the rheostat 8 which is includedin circuit with the generator field winding 3.

An auxiliar so operating t e as to prevent any hunting action. Theauxiliary 'magnet 43 comprises a winding 44 which is connected in serieswith the resistor of the rheostat 8 and in'parallel with the resistor 7and the field. winding 3. The

magnet 43 is provided for a field winding switch members 24 and 25'winding 44 operates on a core armature 45 which is pivotally connectedto a contact arm 46. The contact arm 46 is fulcrumed at 47 and isprovided with a bifurcated end portion 48 which carries the main contactmembers 24 and 25.

In case a voltage above normal value obtains upon the supply conductorsand 6, the .energization of the main magnet 14 is increased foroperating the contact arm 21 to effect engagement between the contactmembers 23 and 25. Upon engagement between the contact members 23 and25, a circuit is completed, from the battery 9 and the exciter generator10, through the windlng 26 of the switch for operating the switch arm 27to effect engagement between contact members 28 and 30, and to separatecontact members 29 and 31. A circuit is completed from one terminal ofthe battery 9 and the exciter generator 10 through the contact members28 and 30, switch arm 27, armature 39, switch arm 33 and the contactmembers and 37 to the other terminals of the battery 9 and the excitergenerator 10. The motor 17 is rotated in a counter-clockwise directionto increase the resistance value of the rheostat 8 which is included incircuit with the generator field winding 3. Thus, the excitation of thegenerator 1 is decreased to lower the voltage obtaining upon the supplyconductors 4, 5 and 6.

In case the motor 17 should be controlled solely by the main magnet 14in accordance with the voltage obtaining upon the supply conductors 5and 6, the motor would not be de-energized to prevent further reductionin the generator excitation until normal voltage obtained upon thesupply conductors 5 and 6 and, consequently, the motor would overtravelto further reduce the excitation of the generator 1 and lower thesupplycircuit voltage below normal value. In order to prevent suchovertravel and the resulting hunting action, the auxiliary magnet 43 isoperated in accordance with the operation of the rheostat 8 and,accordingly, in

' accordance with the energization of the field winding 3 to effectseparation of the contact members 23 and 25 just prior to the obtainingof normal voltage upon'the supply conductors 4, 5 and 6. Thus, theswitch15 is released to de-energize the motor 17 at such time that theovertravel of the motor will not underexcite the generator 1 to reducethe supply-circuit voltage below normal value.

If the voltage on the supply conductors5 and 6 is below normal value,the energization of the main magnet 14 is reduced to effeet engagementbetween the main contact members 24 and 23. Thereupon, the winding 32 ofthe switch 16 is energized for operating the switch arm 33 to effectengagement 66 between the contact members. 34 and 36 and to effectseparation of the contact members 35 and 37. A circuit is completed fromone terminal of the battery 9 and one terminal of the exciter generator10 which extends through the contact members 34 and 36, switch arm 33,motor armature 39, switch arm 27 and the contact members 29 and 31 tothe other terminals of the battery 9 and the exciter generator 10. Themotor 17 is rotated in a clockwise direction for decreasing theresistance value of the rheostat 8 which is included in circuit with thefield winding 3. Thus, the excitation of the generator 1 is increased toraise the supply-circuit voltage to normal value. 50

In order to prevent any hunting action, the energization of theauxiliary magnet 43 is increased to so operate the contact arm 46 as toefi'ect separation of the contact mem bers 23 and 24 just prior to theobtaining of normal voltage on the supply-circuit conductors. Theseparation of contact members 23 and 24 releases the switch 16 todeenergize the motor 17 at such time as will prevent over-excitation ofthe generator- 1 to raise the volta e of the supply conductors abovenormal va ue.

The modified systems disclosed in Figs. 2 and3 are very similar inconstruction and in operation to the system disclosed in Fig. 1 and,accordingly, like parts have been indicated by corresponding referencenumerals.

Referring to Fig. 2 of the drawing, the core armature 20 of the mainmagnet 14 is pivotally connected to a contact arm 50 which is pivotallymounted upon a lever arm 51. The contact arm 50 is provided with adownwardly projecting portion 52 which carries the main contact member23 and with a spring member 53 which counter-balances the core armature20 of the main magnet 14. The lever arm 51 is pivotally mounted at 54and is pivotally connected to the core armature 45 of the auxiliaryelectromagnet 43. A spring member 55 is connected to the lever arm 51for counter-balancing a portion of the weight of the core armature 45.The winding 44 of the auxiliary magnet 43 is connected in series withthe resistor 56 of an auxiliary rheostat 57 across the battery 9 and theexciter generator 10.

The .armature shaft 40 of the motor 17 not only operates the rheostat 8by the gearing 42 but also operates the contact arm 58 of the auxiliaryrheostat 57 by means of a worm gearing 59. By means of such connection,the auxiliary magnet 43 is energized in accordance with the operation ofthe motor 17 and the rheostat 8 and, accordingly, in accordance with theexcitation of the main generator 1.

If a voltage above normal value obtains upon-the supply conductors 5 and6. the energization of the main magnet 14 is increasedfor operating thecontact arm 50 to 130 clockwise -operated as to oppose the action of themain tains upon the supplv conductors,

bers 23 and stat arm 41.

' in excitation of the main generator 1.

efiect engagement between the contact mem- 25. Upon engagement betweenthe contact members 23 and 25, the switch 15 is operated to effectcounter-clockwise rotation of the motor 17 and of the rheo-Consequently, the excitation of the main generator 1 is reduced to lowerthe supply-circuit voltage.

Simultaneously with the operation of the rheostat 8, the contact arm 58of the auxiliary rheostat 57 is rotated in a counterdirection todecrease the energization of the auxiliary electromagnet 43. Uponlowering of the energization of the auxiliary magnet 43, the lever arm51 is so magnet 14 and to effect separation of the main contact members23 and 25. Consequently, the contact members 23 and 25 are separatedjust prior to the obtaining of normal voltage upon the supply conductorsto prevent any so-called hunting action.

In case a voltage below normal value ohthe energization of the auxiliarymagnet 14 is reduced to effect engagement between the contact members 23and 24. Thereupon, the switch 16 is operated to effect clockwiserotation of the motor 17 and of the arm 41 of the rheostat 8 forincreasing the excitation of the generator 1 to raise the voltage uponthe supply conductors. Simultaneously, the contact arm 58 of theauxiliarv rheostat 57 is rotated in a clockwise direction forincreasing" the energization of the auxiliary magnet 43 in accordancewith the incrl iafie e auxiliary magnet 43 operates-the lever arm 51 ina manner to effect 'disen gement of the contact members 23 and 24 ]\1Stprior to the obtaining of normal voltage upon the By connecting supplyconductors so as to prevent any hunting action.

The system disclosed in Fig. 3 of the,

drawing operates in exactly the same manner as the system disclosed inFig. 2 of the drawing and is constructed in the same manner with theexception that the winding 44 of the auxiliary magnet 43 is connected inseries with the resistor 56 of the auxiliary rheostat 57 across twoconductors of the supply circuit in place of being connected across thebattery 9 and the exciter generator 10, as in the system disclosed inig. 2. the winding 44 across the supply conductors 5 and 6, theauxiliary operated in accordance with the operation of the auxiliaryrheostat 57 and in accordance with the variation in the generatorexcitation, but also is operated in accordance with the variation inthevoltage on the supply circuit.

Modifications in' the system and arrangement and location of parts maybe made within the spirit and scope of my invention,

rheostat, and a main m iary m and such modifications are intended to becovered by the appended claims.

I claim as my invention:

1. In a voltage-regulator system, bination with a supply circuit and agenerator connect to the supply circuit, of a main magnet operated inaccordance with the supply-circuit voltage, means comprising amotor-operated rheostat for governing the generator excitation, and anauxiliary magnet for directly controlling said motor-operated rheostatin accordance with the gener ator excitation to prevent hunting action.

2. In a voltage-regulator system, the combination with a sup-plycircuit, a main generator connected to the supply circuit, a main magnetoperated in accordance with the supply-circuit voltage, a rheostat forvarying the excitation of the main generator, and means comprising amotor controlled by the main magnet for operating said rheostat tomaintain substantially constant supplythe comcircuit voltage, of anauxiliary magnet operexcitation to control said switches and preventhuntin action.

4. In a vo tage-regulator system, the combination witha su ply-circuit,and a generator connected to t e supply circuit, a rheostat forcontrolling the excitation of the main generator, a motor for operatingthe et operated in accordance with the supp y-circuit voltage forcontrolling said motor to maintain constant supply-circuit voltage, ofan auxiliary magnet operated in accordance with operation of saidrheostat for controlling said motor to prevent hunting action.

5. In a voltage-regulator system, the combination with a supply circuitand a generator connected thereto, of a main magnet operated inaccordance with the supply-circuit voltage, and an auxiliary magnet, arheostat for varying the generator excitation, a rheo stat for varyingthe excitation of the auxilet, electroresponsive means for operatin 0thof said rheostats, and means cooperatively controlled by said mainmagnet and said auxiliary magnet for actuating sai electroresponsivemeans.

6. In a voltage-regulator system the combination with a supply circuitand a-generator connected thereto, of a main magnet opa main magnet ierated in accordance with the supply-circuit iary magnet for controllingsaid motor-opvolta e, and an auxiliary magnet, means for erated rheostatin accordance with the genmodi ying the generator excitation, meanserator excitation and for preventing hunting for modifying theexcitation of the auxiliary action. 20 magnet, and electro-responsivemeans for op- 8. In a regulator system, the combination crating said twolast mentioned means. with a supp y c1rcu1t and a dynamo-electric 7. Ina voltage-regulator system, the commachine connected thereto, ofcooperating bination with a supply circuit and a. genermain andauxiliary electromagnets, means ator connected thereto, a main magnetopfor inde endently varying the excitation of 25 erated in accordancewith the supply-circuit said mac ine and of at least one of Saidelecvoltage, and an auxiliary magnet, means tromagnets, the actuation ofsaid means becomprising a motor-operated rheostat for ing controlled bysaid main electromagnet. governing the generator excitation, means Intestimony whereof, I have hereunto comprising a rheostat for governingthe exsubscribed my name this 12th day of Au- 0 citation of theauxiliary magnet, means actugust 1919. ated by said main magnet and bysaid auxil- CLARENCE A. BODDIE.

